1. 1) NIOSH. Vibration syndrome current intelligence bulletin 381983. NIOSH, Washington DC.
2. 2) Armstrong JH (1998) The railroad. What it is, what it does., Simmons-Boardman Books, Omaha.
3. 3) Solomon B (2001) Railway maintenance, MBI Publishing Company, St. Paul.
4. 4) Force JAT (1977) Job analysis summary: physical demands and environmental conditions for the job of section laborer/trackman. In: Consulting Report No 54, Lawshe CH, (Ed.), West Lafayette.
5. 5) Landsbergis P, Johanning E, Stillo M, Jain R, Davis M (2019) Work exposures and musculoskeletal disorders among railroad maintenance-of-way workers. J Occup Environ Med 61, 584–96.